Replace the Key Fob Battery

When the i10’s remote only locks the car from a step away, the coin cell inside is fading. A fresh CR2032 takes a couple of minutes and the remote keeps its coding — you are only changing the battery, not reprogramming the key.

Replace the i10 key fob battery

1. If your key has a fold-out or separate metal blade, slide it out first — it often releases the case.
2. Open the case. On a one-piece remote you can twist a coin in the seam to pop the cover; on a two-piece remote remove the small screw first, then separate the halves.
3. Lift out the old CR2032 coin cell.
4. Fit the new cell the correct way round (match how the old one sat — on some i10 remotes the positive side faces down, on others up), handling it by the edges only.
5. Clip the case back together, refit any screw and slide the key blade home.

Programming a brand-new remote to the car needs Hyundai diagnostic equipment, but a simple battery change like this needs nothing more than the coin cell.

Frequently asked questions

Which battery does the i10 remote take?

A CR2032 3 V lithium coin cell, available anywhere. Fit a fresh one rather than a half-used cell from a drawer.

Which way up does the cell go?

It varies between the i10’s remote types, so note how the old cell sits before you lift it out and copy that orientation. Getting it upside down simply means the remote will not work until you flip it.

The remote still will not work with a new battery — why?

Check the cell is seated and the right way up, and that the contacts are clean. If it still fails, the remote may need re-syncing at a dealer, but a flat or reversed cell is the usual cause. The metal key blade always unlocks the driver’s door in the meantime.

If a key or immobiliser warning shows on the dash, you can look the code up on autodtcs.com.